Wrench



(No Model.) I

T. GREEN WRENCH.

No. 595.164. Patented De0.'7,1897.

Inventor. aim 5m ZEa/mm s e. S g e m. 1 W

Attorney man STATES PATENT Fries,

THOMAS GREEN, OF DAVENPORT, IOIVA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 595,164, dated December '7, 1897. Application filed Augu t 19, 1897. Serial No. 648,783. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS GREEN, a citizen of the United States, and a resident of Davenport, in the county of Scott and State of Iowa, have invented certain new and useful Improvements in Wrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a side elevation of my wrench. Fig. 2 is an enlarged sectional view, partly broken away. Fig. 3 is a detail view in perspective, showing the pawl and carrier. Fig. 4 is a detail view of the device for actuating the carrier, and Fig. 5 is a perspective detail view of the cover or guard.

This invention is designed to provide an improved nut-wrench of simple, convenient, and effective character, and which possesses certain features or advantages hereinafter pointed out; and the invention consists in the novel construction and combination of parts, all as hereinafter described, and pointed out in the appended claims.

Referring to the accompanying drawings, the letter A designates the fixed jaw of the wrench, which is formed as an integral part of the bar or shank B, the latter having upon its inner face a series of ratchet-teeth, each of which is formed with a straight side Z) and with a curved side Z)".

O is the movable jaw, which is formed on a slide D, mounted on the bar or shank B. Said slide has therein a through-slot or mortise E, in which is fitted a reciprocating pawl-carrier F, in which are mounted a series (in the presentinstance three) of independently-movable pawls G, having laterally-flanged or T heads. These pawls are placed side by side in the slot or opening of the said carrier, and each of them has in its upper headed end portion a seat 1 for a small spring whose opposite end bears against the outer wall of the slot or mortise E, and which normally acts to hold the pawl in engagement with or in position to engage with one of the teeth I). It will be seen from Fig. 3 that the carrier engages the flanged heads of the pawls G in such a manner that if the carrier be moved away from the bar or shank D all the pawls will be carried therewith.

J is a device for actuating the said carrier F for the purpose of retracting the said pawls against the action of their springs. Said device comprises a U -shaped yoke seated in the slide D, which is slotted and recessed to receive the same, as best shown in Fig. 4. The inner ends of the arms of the said yoke are bent outwardly, as shown, to form feet which impinge against the inner edge portions of the carrier F, whereby by pressing upon the head portion J the said carrier is moved in the slot or mortise E to retract the pawls. Said pawls are differentially arranged with respect to the teeth Z); or, in other words, the distance between two adjacent pawls is less than the difference between two adjacent teeth, whereby as the slide is moved upon the bar or shank B to secure the desired adjustment of the wrench it is possible to make more than one adjustment of the movable jaw for each of said teeth-that is to say, supposing one adjustment to be made by the engagement of one of the pawls with a certain tooth, a second adjustment can be obtained by the engage ment of the following pawl with the same tooth before the slide has been moved sufficiently far to bring the first pawl into engagement with the succeeding tooth. This arran gement it will be readily seen provides for an accurate adjustment of the wrench.

K designates an approximately U-shaped cover or guard which is placed upon the slide to inclose and protect the carrier F and its pawls. This cover is preferably formed of metal which has some inherent elasticity and may be secured in place by forming upon its inner side a small projection is, which is designed to engage a corresponding depression 7c in the slide.

L designates a notch in the bar or shank below the teeth I), which is for the purpose of preventing the slide from slipping off the same.

In addition to the accuracy of adjustment above referred to the wrench can be adjusted very quickly and easily, as the thumb of the hand which holds the wrench can be engaged with the pushhead J of the yoke J to hold the pawls retracted and at the same time to move the slide. If any part of the wrench should break, it can be readily replaced.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The herein described improved nutwrench, comprisingthe bar or shank having the fixed jaw and the series of ratchet-teeth upon its inner edge, the slide carrying the movable jaw, the pawl-carrier seated in a slot or mortise of the said slide, and two or more independent spring-pressed pawls seated in said carrier and adapted to engage the said teeth, said pawls being arranged differentially with respect to theteeth, together with means for actuating said pawl-carrier to retract the said pawls, substantially as specified.

2. In a nut-wrench, the combination with the bar or shank having the fixed jaw and the series of ratchet-teeth upon its inner edge, of the slide formed with the movable jaw and having a through-slot or mortise therein, the slotted pawl-carrier movably seated in said slot or mortise, the independent spring pressed pawls seated in the said carrier and adapted to engage the said teeth, adjacent pendent spring-pressed pawls seated in the said carrier and adapted to engage the said teeth, adjacent pawls being separated from each other by a distance less than the distance between adjacent teeth, the movable push-yoke seated in said slide and engaging the'said pawl-carrier,and the removable cover or guard inclosing the said pawl-carrier and pawls, substantially as specified.

In testimony whereof I afiix my signature in presence of two witnesses.

. THOMAS GREEN.

YVitness'es:

D. O. LEONARD,

WV. B. DAY. 

